Expansion valve



FIG. 1 is a front elevational view of a first embodiment of an expansion valve showing my new design, a rear elevational view being symmetrical to the front elevational view;

FIG. 2 is a right view of the expansion valve of FIG. 1;

FIG. 3 is a left side view of the expansion valve of FIG. 1;

FIG. 4 is a top plan view of the expansion valve of FIG. 1;

FIG. 5 is a bottom view of the expansion valve of FIG. 1;

FIG. 6 is a perspective view of the expansion valve of FIG. 1; and,

FIG. 7 is a bottom perspective view of the expansion valve of FIG. 1. 

The ornamental design of an expansion valve, as shown and described. 